$20k top, full range speakers?

GamuT L7s if you can find a pair; they were recently discontinued in favor of the "S" series. Similar but much more expensive. Great sound at all volumes to my ears. I have the L5s, the 7s would be too large for my room. They were around $17000 but have been showing up on Audiogon for $7K to $8K. The best looking speaker I have ever had with the best build quality.

I am surprised that you mentioned enjoying the KEF 104 and have not looked at their modern version the 207.2.

I have these speakers and when properly setup are about as good a speaker that you can purchase.

The KEF's have an absolutely stunning mid-range, fast and well defined deep bass, the speakers are remarkably transparent, the sound-stage is incredibly wide the speakers totally disappear. The Kef's have outstanding resolution an can play very loudly as well.

Personally I would take these speakers over the Sasha, the Magico, and the Sonus Fabers. The Ushers are very good they are not quite as coherent as the Kef's nor will play as loudly. If you are in my area I would love to have you over for a listen!

DeVore Fidelity Reference Silverback or Verity Leonore. Both are excellent albeit quite different in their musical presentation.

Look for JM Labs (Focal) Nova Utopia, about $20k.

Mike